the plot of minerals may help or try feeding a allstock mix instead of just plain corn. this is what I have in the feeder in this pic. Corn, Molasses, Oats or just buy some dried molasses and add to your corn. it'll sweeten it up.
ditto, i was putting out corn for 3 months had not seen the first deer, fed a friend of mine horses once while he was on vacation, found out that deer love all grain sweet feed, i guess they can smell it better, there were deet showing up within the week